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Adding some guard blocks when people fool around with their environment

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This commit is contained in:
Miroslav Štampar 2026-07-20 22:19:57 +02:00
parent 37771f0d25
commit e589936982
3 changed files with 22 additions and 12 deletions
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23
lib/parse/banner.py
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@ -12,6 +12,7 @@ from xml.sax.handler import ContentHandler
from lib.core.common import Backend
from lib.core.common import parseXmlFile
from lib.core.common import sanitizeStr
from lib.core.common import singleTimeWarnMessage
from lib.core.data import kb
from lib.core.data import paths
from lib.core.enums import DBMS
@ -103,13 +104,17 @@ def bannerParser(banner):
if not xmlfile:
return
if Backend.isDbms(DBMS.MSSQL):
handler = MSSQLBannerHandler(banner, kb.bannerFp)
parseXmlFile(xmlfile, handler)
try:
if Backend.isDbms(DBMS.MSSQL):
handler = MSSQLBannerHandler(banner, kb.bannerFp)
parseXmlFile(xmlfile, handler)
handler = FingerprintHandler(banner, kb.bannerFp)
parseXmlFile(paths.GENERIC_XML, handler)
else:
handler = FingerprintHandler(banner, kb.bannerFp)
parseXmlFile(xmlfile, handler)
parseXmlFile(paths.GENERIC_XML, handler)
handler = FingerprintHandler(banner, kb.bannerFp)
parseXmlFile(paths.GENERIC_XML, handler)
else:
handler = FingerprintHandler(banner, kb.bannerFp)
parseXmlFile(xmlfile, handler)
parseXmlFile(paths.GENERIC_XML, handler)
except Exception:
# best-effort banner fingerprinting - a broken/patched xml.sax must not abort the scan (see #6086)
singleTimeWarnMessage("unable to parse the DBMS banner for version fingerprinting")

9
lib/parse/headers.py
View file

@ -8,6 +8,7 @@ See the file 'LICENSE' for copying permission
import os
from lib.core.common import parseXmlFile
from lib.core.common import singleTimeWarnMessage
from lib.core.data import kb
from lib.core.data import paths
from lib.parse.handler import FingerprintHandler
@ -32,5 +33,9 @@ def headersParser(headers):
for header, xmlfile in kb.headerPaths.items():
if header in headers:
handler = FingerprintHandler(headers[header], kb.headersFp)
parseXmlFile(xmlfile, handler)
parseXmlFile(paths.GENERIC_XML, handler)
try:
parseXmlFile(xmlfile, handler)
parseXmlFile(paths.GENERIC_XML, handler)
except Exception:
# best-effort header fingerprinting - a broken/patched xml.sax must not abort the scan (see #6086)
singleTimeWarnMessage("unable to parse the response headers for technology fingerprinting")